Curling iron



FIG. 1 is a top, right side perspective view of a new, original and ornamental design for a curling iron according to one embodiment;

FIG. 2 is a top plan view of FIG. 1;

FIG. 3 is a bottom plan view of FIG. 1;

FIG. 4 is a left side elevation view of FIG. 1;

FIG. 5 is a right side elevation view of FIG. 1;

FIG. 6 is a rear elevation of FIG. 1;

FIG. 7 is a front elevation view of FIG. 1;

FIG. 8 is a bottom, right side perspective view of FIG. 1;

FIG. 9 is a bottom, left side perspective view of FIG. 1;

FIG. 10 is a top, right side perspective view of a new, original and ornamental design for a curling iron according to another embodiment;

FIG. 11 is a top plan view of FIG. 10;

FIG. 12 is a bottom plan view of FIG. 10;

FIG. 13 is a left side elevation view of FIG. 10;

FIG. 14 is a right side elevation view of FIG. 10;

FIG. 15 is a rear elevation of FIG. 10; and,

FIG. 16 is a front elevation view of FIG. 10.

The broken lines in the drawings depict portions of the curling iron that form no part of the claimed design. 

CLAIM The ornamental design for a curling iron, as shown and described. 